What purity percentage of oxygen is required to be considered medical grade?

To be classified as medical grade, oxygen must meet specific purity standards that ensure its safety and efficacy for therapeutic use. The recognized standard for medical grade oxygen is a purity level of 99% or higher. This threshold is established in order to minimize contaminants that could potentially pose a risk to patients when used for medical treatments.

Oxygen at this level of purity ensures that it is suitable for a variety of medical applications, including anesthesia, respiratory support, and other critical care procedures. Purity levels below 99% may introduce contaminants that are not acceptable for medical use, as they could lead to adverse health effects or reduce the effectiveness of the treatment provided.

Thus, for oxygen to be deemed safe and effective for medical applications, it must reach this 99% purity standard.